Portable sawmill with carriage traveling over husk



A. J. BACH 2,612,913

PORTABLE SAWMILL WITH CARRIAGE TRAVELING OVER HUSK Oct. 7, 1952 5Sheets-Sheet 1 Filed Nov. 18, 1949 IN VEN TOR.

A. J. BACH Oct. 7, 1952 PORTABLE SAWMILL WITH CARRIAGE TRAVELING OVERHUSK 3 Sheets-Sheet 2 Filed Nov. 18, 1949 IN VEN TOR.

Oct. 7, 1952 A. JJBACH 2,612,913

PORTABLE SAWMILL WITH CARRIAGE TRAVELING OVER HUSK Filed Nov. 18, 1949 3Sheets-Sheet 5 1 \D IN VEN TOR. m

Patented Oct. 7, 1952 OFFICE FDRTABLE SAWMILL WITH CARRIAGE i TRAVELINGOVER HUSK Arthur .lohn Bach, Lumby, British Columbia,

Canada Application November 18, 1949, Serial No. 128,032

In Canada November 19, 1948 My invention relates to saw mills, moreparticularly having reference to a combined saw mill and edger mountedfor travel as a self propelled unit.

In the art to which the invention relates portable saw mills and edgersare more usually con structed as individual units, and employ separatepower means for driving the mill and for its transportation. The presentinvention contemplates improvements in saw mills and edgers by combiningthese in a single unit, and incorporating in the unit a motorccnnectable for either propulsion of the unit or for driving the sawmill'mechanlsms.

One of the objects of the invention is accordingly to provide a portablesaw mill, combining therewith an edger, both run from a common source ofpower.

A further object of the invention is to provide in a saw mill apparatus,a motor carried in the apparatus and adaptedto be connected forpropulsion of the mill, or to the mill mechanism for driving the sawsand carriage.

A further object of the invention is to provide an improved carriage forthe mill embodying an offset or step by which the motor assembly may becarried in the mill below the carriage, and permitting use of largepulleys and making full use of the main frame of the mill possible. Thisarrangement also provides a more compact unit that is convenient fortravel, and further in setting up the mill there are no belts to tightenor line up, and both ends of the mill are open.

Other features and advantages of the invention will become apparent byreference to the accompanying description taken in conjunction with thedrawings, wherein like characters or reference indicate like partsthroughout the several views, and wherein: i

Fig. 1 is a rear end view of the mill.

Fig. 2 is a perspective view of the carriage taken by itself andincluding the connection with the friction cable.

Fig. 3 is a side View of the body of the mill, with certain partsomitted and shown partly broken away.

Fig. 4 is a plan view of the body of themill, shown partly broken away,and with the carriage and rear wheels omitted. i

Having reference to the drawings, the mill ineludes side frame members iand 2 of I beam construction, with cross bars 3 at intervalsand asrequired for mounting the workingparts of the mill. The frame issupported forwardly on an axle 5 with wheels 6, and rearwardly on 3Claims. (Cl. 143-105) wheels 1 on an axle 8 that includes a differentialat 9 with driven shaft Ill connected therewith and in turn said shaftbeing connectable to be driven by a drive shaft ll of a motor unit l2located forwardly in the machine. This connection between the shafts l0and ii is indicated by the numeral l3, and as shown in Figure 3 may bebroken toconnect the shaft H with a saw mill drive shaft M, the shaftsID and 114 being supported from the frame bar 2 by a bracket it.

Mounted rotatable in bearing members It secured on the under side of thetop plates of tie ,main frame bars I and 2 is a mandrel shaft ii i withsaw collar 8 for mounting a circular saw blade l9, and for which a sawguide 29 is pro vided on a bracket 2! secured to the frame member l.

There is further provided a mandrel shaft 22 for the edger saws, thisshaft being rotatable in bearing members 23 attached on the under sideof the lower horizontal portions of the beamslandl.

The saw mill drive shaft 14 connects by a gear casing 24 to drive themandrel shaft- 22, and

- this shaft carried a belt pulley unit 25: for driving a pulley unit'26 fixed on the saw mandrel mounted for rotation in brackets 3 3 onsupplemental bars secured to adjacent frame bars 3. The feed rollers areto be driven by pulley wheels 35' over which, and a drive pulley 36 onthe edger mandrel shaft, a belt would be trained.

The carriage for the mill is separately illustrated in Figure 2. Forconvenience of illustration this carriage is of a design for use on aleft hand mill, whereas the mill as herein shown is what is known as aright hand mill, it being understood that a reverse carriage structurewould be employed in a right hand mill. The carriage in position fortravel on the mill is shown in Figure 1. i

The carriage provides in the present showing three transverse framemembers, each including an upper horizontal section 31, a verticalsection 38 and lower horizontal section 39, Each frame member is formedof two such parallel spaced apart strips, as indicated at 48 and 4|. Theframe members are attached on angle iron Supports 42 running lengthwiseof the carriage.

Mounted sidewise movable on the horizontal frame sections 31' and 39 arehead blocks 43 that include horizontal members 44 mounted slidable onthe frame sections 3! and vertical members 45 slidable in "the sections39. The head blocks ar connected by strips 46, and further includemanually operable dogs =41. The carriage head blocks are moved by a setworks shaft 48 mounted on the under side of the frame in bearings 49,and providing toothed pinions 59 engaging rack bars 5! on the framesections 31. The shaft 48 may be actuated by a lever 52.

The upper level of the carriage is ,mountedfor travel on wheels 53carried by brackets 54 on a lengthwise angle iron support 42, the wheelsbeing adapted for travel on a track 53' on the main frame side bar 2.The lower carriage level is provided with shafts 55 at intervals fixedin brackets 56 and mounting rotatable ,thereon'wheels 5'! that areadapted for travel on the upper flange 58 of the main frameside bar vI.

For effecting travel of the carriage .I provide a chain 59 having theends thereof fixed one to each end of the carriag the chain beingtrained over pulleys t0 and 6| carried onend cross bars 3 of the mainframe. Transversely in the main frame is mounted for rotation .a shaft62, the one end thereof being supported in .a bearing bracket 63 on themain frame bar I, and the other end carried in a fever arm 64 pivotallyattached on the frame bar 2. On the shaft 62 is a sprocket wheel 65 overwhich the chain .59 engages for effecting travel of the carriage ineither direction by rotation of the shaft 62. Included with this is arocker arm 66 free to rock on the shaft 62 and carrying pressuresprockets 61 under which the chain 58 passes to take up slack at thesprocket drive wheel 65.

For putting the carriage in motion in either direction I provide a cable68 fixed at one end to an eye bolt 69 on a support '19 on an end framebar 3. The cable is carried over a pulley H on an arm 12 of a lever 13that pivots at 14 on the carriage frame.

The cable is then carried over a pulley on a depending bracket 16 on thecarriage, and extends to and is attached to one end of a pivotallymounted bracket arm Tl. From the other end of this bracket arm a-cable68' connects to the lever arm 64. Thelever 1.3 is normally held neutralby a spring I8.

For driving the shaft 62 I provide a combined friction pulley withWheels 19 and on said shaft adapted to be driven by a pulley wheel 8| onthe saw mandrel shaft l! to feed the carriage towards the saws and to beengaged bya reverse pulley 82 for Withdrawal ,of the carriage. This icontrolled by lever 13 which may be moved to actuate the arm 64 againstthe tension of a spring 83 to drive the carriage .for feeding, or to bereversed, when spring 83 will move the arm 64 to engage pulley wheels 19and 82. ,An idler pulley 84 is provided on an arm 85 for belt 86 on thepulleys 89 and 8 I.

Additionally to the foregoing I provide jack screws 81 at the framecorners by which the frame may be levelled when thesaw is set for use.There are also provided dead rolls at 38 for the logs, and roll poles,asat 89, which are removable.

On the opposite side of the frame is shown a cut-off attachment thatincludes a'frame 90 with saw shaft 9| and saw 92, the shaft 9! beingdriven from a pulley wheel 93 on the main drive shaft I l connectable toa pulley 94 on shaft 9i.

There is also provided a straight edge 95 carried on arms 96 pivotallymounted on the frame bar I in relation to the edger.

In the operation of the device the mill may be propelled by the shaft l0connected by shaft H to the engine, or when in use as a saw mill andedger the shaft ll would be coupled, as at it, to

the mill driven shaft 14.

The shaft l4 drives the edger mandrel shaft 22 and through pulley units25 and 26 drives the main saw mandrel shaft ll.

The carriage travels on the guide wheels 53 on the track 53' and thelower level wheels 51, and is moved by the chain 59 trained over pulleys6E! and BI, the chain being carried in operative relation to thesprocket wheel 65 on the shaft 62 by sprocket pinions 6! on rocker arm86.

The carriage is controlled by lever it which is "normally heldinoperative by spring 78 but may beputin motion by actuation of thelever 13 to move arm 64 and drive the carriage shaft 62 by the pulleys8| and 89, or reversed by moving the lever .13 oppositely when spring 83would move arm 54 to cause pulley 19 to be reversely driven by PulleyB2.

Insetting -up the machine for work the screw jacks 8] would be employedto level the saw mill frame on itssupporting wheels.

While I have herein disclosed a preferred embodiment of my invention, itis obvious that changes in the construction of parts and elements wouldbe permissible, and in so far as such changes come within the spirit andscope of the invention as defined inthe appended claims they would beconsidered a part hereof.

Having thus particularly described and ascertained the nature of myinvention, what I claim and Wish to secure by Letters Patent is:

,1. In a sawmill a frame, a log saw mandrel shaft :in the frame and asaw on the shaft, a motor, means connecting said shaft to be driven fromthe motor, said motor and driving means being carriedon one side of asubstantially medial line lengthwi-se'of the frame, a carriage mountedfor travel on the frame, said carriage providing upper 'andlowerhorizontal levels extending one on each side of a vertical substantiallymedial plane longitudinal of the carriage with the upper level adaptedfor travel over the motor and driving means, head blocks for thecarriage, means mounting said head blocks for travel as a unit movableacross the carriage, said lower level being adapted to carry thematerial to be sawed thereon, means for effecting movement of the headblock unit,,and,means for driving the car riage in either directionincluding manual controls therefor.

2. In asawmill providing two main frame bars lengthwise of the millspaced apart, a mandrel shaft mounted for rotation transversely betweenthe frame bars and a saw on the shaft, a carriage for travel on theframe bars, the mill including mechanism on one side of a substantiallymedial line lengthwise of the frame bars for driving the mandrel shaftand operation of the carriage, including a source of power for drivingsaid mechanism, and said carriage providing an upper horizontal levelfor travel over said mechanism and a lower horizontal level adapted forcarrying a log to be cut and for travel on the opposite side of themedial line to the mechanism, and including vertical frame portions connecting said levels, and means mounting the 5 6 carriage for travellengthwise on the frame bars. REFERENCES CITED A device as defined inclaim 2 and including The following references are of record in the headblocks mounted to slide sidewise on the m f tm tent: horizontal levelsof the carriage, a. set works 8 o 8 pa shaft mounted lengthwise of thecarriage and 5 UNITED STATES PATENTS connectable to be driven from thesource of Number Name I Date power in the mill, pinions on said shaft,and 1 ,1 Thompson 20, 9 rack bars transversely carried in the upperlevel 1,420,9 Brady June 27 9 of the arria e engaged by said pinions.1,874,519 Haubroek Aug. 30, 1932 10 1,984,492 Peace Dec. '18, 1934ARTHUR JOHN BACH. 2,377,236 Jackson May 29, 1945

